Thomas eose



(No Model.)

\ T. ROSE.

PUMP.

N, Finsmlwvmognpher. washing aC.

PATENT. OFFICE.

THOMAS ROSE, OF SAN ANTONIO, TExAS, ASSIGNOR TO ROY-AL oIIAPIN,joF 'SAMEPLAGE. Y i f.

PUM P.

SPECIFICATION forming part of Lettere Pet-.ent Ne. 244,673, dated July19, 1881.

\ Application nieu November 27,1880. (No model.)

To all whom it may conce/rn: A

Be it vknown that I, THOMAS ROSE, of San Antonio, in the county of4Bexar and State of Texas, have invented a certain new and useful 5Pump; and I do hereby declare that the following specification, taken inconnection withv the -drawin gs furnished and forming a part of thesame, is aclear, true, and complete descriptin ot' my invention. A ro Mynovel pump has been specially devised for use in pumping gas, air, orvapor-as in ice-machines, for instance-and mainly with reference' toattaining circulation with low pressure; but when operated at high speedx5 considerable pressure may be attained therewith, whetheroperatingupon vapor or liquids, as I believe my pump involves a novelmode of operation, in thatit possesses characteristics partially commonto pumps of the rotary zo system, as well as to those having`a'reeiproeating piston. Otherwise stated, my pump contains a pistonwhich is operated rotatively, as in a rotary pump, and alsoreciprocally, as in the sliding-piston pump; and, further, no 2 5 valvesarev required therein, because ot its analogy to a rotary pump. Thepiston, however, by reason of its peculiar construction, operates in onesense as a valve, in that the exit from the pump-chamber is opened orclosed according to the position occupied by the slidingqpis- -'tonduringits reciprocating motion.

To more particularly describe my invention I will refer to theaccompanying drawings, in which Figure 1 is a transverse verticalcentral sectionof a pump embodying myinvention. Fig. 2 is a centralvertical section of the same in a plane at right angles to that shown inFig. l. y

. The pumpvcasing will usually be composed 4o of metal, and in suchsectional arrangement as may be conducive to economic construction. Itessentially containsa maiuchamber, A, and an auxiliary chamber, B, andwhat I will term la rock-shaft chamber, C, located between them. Theinterior walls of the main chamber A and rock-shaft chamber C must betruly vfinished, the former being a hollow cylinder and the latterpractically so, for receiving the rock-shaft and a'ording a good 5obearing therefor, after themanner of a journal-box. The induction-port ais located in the circular wall of the main chamber, closely ladjacentto the rock-shaft chamber, and the exit-port b is located in the topofthe auxgear, and it communicates with the pistonshaft E by counterpartpinions on said shaft and gears on the pump-shaft, which is con- 6'5-structed in two parts, so as not to occupy the interior of thepump-chamber. Each portion ot' the pump-shaft has keyed to its inner enda disk, f, which occupies an annular recess in the head of thepump-chamber, and said two 7o disks are either coupled together by arod, or each may be provided, as shown, with a-cylin dricaljournal-stud, g, located on the inner side of the disk and near itsperiphery, after the manner of a crank-pin, and the gearing so drivesthe disks that these studs always occupy the same position withreference to each other.

The'piston F is in form at, straight plate, well finished on both sides,and provided 8o on one side with a series of longitudinal channels, h,andat one end with a solid cylinder,

t', axially chambered ateach end to receiveA the journal-studs g, and bethereby operatively connected with the disks f and their drivingmechanism. rIh'e periphery of the cylindrical portion of the piston isclosely Vlocated adjacent to the interior surface of the mainchamber A,and the fiat portion, occupying the -same'plane as the axis of thecylindrical por- 9o tion, extends from the main chamber through arectangular opening in the center'l of the rock-shaft G into4 theauxiliary chamber" B. The rock-shaft G is journaled throughout itslength, and has its bearings aiorded by the finished walls oftherock-shaft chamber C and annular recesses in the end plates of thecasing.

With the parts as thus described it will be i readily seen that as thedisks are rotated in roc the direction of the arrow in Fig. l the lowerend of the piston will be carried thereby in a circular line away fromthe induction-port a, thereby inducing the vacum requisite for chargingthe main chamber, and that when one or more revolutions have been madethe contents of the main chamber will each time be forced through theseveral channels 7L in the rear side of the iiat portion of the pistonupward and into the auxiliary chamber, and thence through theoutlet-port b. The channels hin the piston extend from the outer endthereof to such a point thereon as will enable them to be practicallyclosed by the rock-shaft'durin g the passage of the lower end of thepiston in its closest proximity to the rock-shaft, and just prior to itspassage across the inlet-port. The longitudinal movement of the pistonin its passage through the rock-shaft imparts to its upper end avibratory movement, and therefore the auxiliary chamber need only be ofsuch internal dimensions and form as will aiord the requisite spacetraversed by the piston during its complex movements.

With reference to the packing of the several parts of the pump at whichleakage should be prevented, I am aware that further use and experienceare probably required to develop the systems of packing best adaptedthereto; but so far as my experience goes the usual and well-known formsof gland-packing may be relied upon adjacent to the piston-shaft E, asindicated in the drawings. As betweeg the peripheries of the disks f andthe coincident surfaces of' the annular recesses in the casing, I employexpansive metallic segmental sections, after the manner ofpiston-packing in steam-engine cylinders, and the same method may bealso relied upon for packing between the rock-shaft and the recesses inwhich its ends are respectivelylocated. As between the rock-shaft andits main or longitudinal bearings, I rely upon a pair ot' straightmetallic bars or plates, k, housed in recesses in the casing or wall ofthe rock-shaft chamber G, and so backed up by springs as to cause themto bear with regularity and in close contact with the periphery of therock-shaft.

In packing with relation to thc piston I have to provide for its complexmovement and its constantly-varying relations to the interior surface ofthe chamber A. The lower end or cylindrical portion i ofthe pistonenables it to present consecutively and progressively different portionsof its periphery' for close contact with the chamber, and therefore Iprovide a series of independent packing-strips, l, located inlongitudinal radial recesses at equidistant intervals throughout itsperiphery, so that some one or more of these strips will always be inpacking contact with that portion ofthe chamber-wall for the time beingtraversed thereby. These packing-bars lare preferably capable of radialmovement within certain limits, and so backed up by springs as to enablethem to compensate for wear and to maintain good packing contact. Ineach end of the cylindrical portion of the piston annular groovescotaining fiat ring-packing backed by springs may be relied upon formaintaining a packed joint between it and the disks f.

For packing between the reciprocating fiat portion of the piston F andthe coincident surfaces of the rock-shaft I employ the strips or bars m,occupying oppositely-located recesses in the interior of the rock-shaft,and so backed up by springs as to force them into good packing contactwith both sides of the piston. For obviatin g irregular Wear of thepacking m on the channeled side of the piston, the channels h areinclined or laid out angularly with reference to the edges of thepiston, so that in the reciprocating movement ofthe piston the packingon that side throughout its length will be swept or traversed by thechannels, they being inclined sufficiently' to cause the upper end ofeach to extend beyond a rightline occupied by the lower end of the nextadjacent channel.

I am well aware that much variation may be made in details ofconstruction without departing from the main feature of my invention,and I do not therefore limit myself to the precise constructionillustrated and described.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The pump, substantially as hereinbefore described,embodying the main and auxiliary chambers and the rotary reciprocatingchanneled piston.

2. The combination of the two chambers, the rock -shaft and its chamber,the revolving disks, and the piston, substantially as described.

3. The combination of the chambers, rockshaft, and revolving disks, andthe piston, partially fiat and channeled and partially cylindrhcal,substantially as described.

4. The reciprocating rotary piston provided with inclined channels, incombination with packing upon the channeled face of the piston,substantially as described.

5. The reciprocating rotary piston provided with a cylindrical lower endandlongitudinal packing, in combination with the chambers, rock-shaft,and disks, substantially as de scribed.

THOMAS ROSE. Witnesses:

W. W. HERRON, J AMES DURYEE STEVENsoN.

IOO

